Furnace attachment.



WJ TNESSES .No. 880,656. PATBTED MAR. 3, 1908.

G. A. GUSTAPSON.

FURNAGE ATTACHMENT.

APPLICATION FILED SEPT. 7, 1907.

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Y n In www No. 880,656. PATENTBD MAR. 3, 1908.

G. A. GUSTAFSON.

BURN AGE ATTACHMENT.

APPLICATION FILED SEPT. '1, 1907'.

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NITE STATS ATT `FFICE GUSTAF A. GUSTAFSON, CHICAGO, ILLINOIS.

FURNACE ATTACHMENT.

Specification of Letters Patent.

No. 880,656. Patented March s, '1908.

Application filed September 7. 1907. Serial No. 391.794.

To all whom it may concern:

Be it known that I, GUsTAF A. GUsrAFsoN, citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Furnace Attachments, of which the following is a speciiication.

This invention is an attachment which is used in connection with smoke consuming devices for steam boiler furnaces, and is especially an improvement in one of the parts shown in my United States Patent No. 839,134, dated December 25, 1906. Said patent discloses mechanism for controlling a discharge of steam or steam and air, into the 'fire box, the device being actuated by the opening and closing of the furnace door, whereby the air or steam is blown into the fire box when the door is opened, and continues to iiow for a certain time after the door is closed. Since the present invention relates to one of the parts used in said patented apparatus, the description and drawing will be confined thereto, and reference may be had to the said patent for a description and illustration of the other parts of the apparatus, if thought necessary.

The present invention relates particularly to a vessel or holder for a body of water, mercury or the like, whose iow controls the closure of the steam or air valve.l

In the accompanying drawings, Figure 1` is a plan view of the holder. Fig. 2 is a partial longitudinal section. Fig. 3 is a cross section. Fig. il is a sectional view of the front of a furnace, showing the use of the attachment.

The holder 9 consists of an elongated vessel with enlarged bulbs or chambers at the end, and is adapted to contain a body of water, mercury or other liquid which will flow from one end to the other as the holder is rocked. At the middle it has trunnions 22 on which it rocks, and it also has a vent pipe or passage 23 connecting the opposite ends of the holder to permit a flow of the contained air from one end to the other of the holder in the practical operation of the apparatus. In these respects it is the same as the structure shown in the patent referred to.

The passage from one end to the other of the holder is controlled by a swing check valve 12 which is pivoted at 14 within the casing at the middle of the holder, and this valve allows flow of the contained liquid in one direction, but closes against flow in the other direction. To provide a delayed iiow of the liquid around the check valve a small passage 13 is made around said valve in the casing. This by-pass is provided with a thumb screw 15 whereby its size, and consequently the flow, may be regulated. A screw plug 16 closes a passage communicating with the bottom of the by-pass, and may be removed for the purpose of cleaning the by-pass, of grit, scale or other dirt. A plug 17, at the top of the casing, can be removed to fill or empty the holder. y

In operation, when the holder (which controls the air or steam valve to the fire boX) is tilted in one direction, the liquid flows quickly through the check valve 12 which swings open. When the holder is tilted in the other direction the check valve closes and the liquid has a delayed flow around the valve through the by-pass 13, thereby controlling the length of time the air or steam valve is held open, as more fully explained in my said patent.

I claim 1. The combination of a rocking holder having a passage from'one end to the other, a check valve in said passage, and a by-pass in the casing of the holder, around said check valve.

2. The combination of a rocking holder having a passage from one end to the other, a valve casing at the middle of said passage, having a check valve therein, and also having a by-pass inthe floor thereof, around' said valve, and a set screw controlling the size of said by-pass.

In testimony whereof I afliX my signature, l

Vitnesses:

NELLIE FELTSKOG, W. J. RoBINsON. 

